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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > On a perceptron version of the Generalized Random Energy Model

## On a perceptron version of the Generalized Random Energy ModelAdd to your list(s) Download to your calendar using vCal - Bolthausen, E (Zrich)
- Monday 15 December 2008, 11:30-12:30
- Seminar Room 1, Newton Institute.
If you have a question about this talk, please contact Mustapha Amrani. Mathematics and Physics of Anderson localization: 50 Years After We consider a macroscopically large family of cavity variables whose covariances are given in a hierarchical way, similar to Derrida’s generalized random energy model. The model is similar to the perceptron where the cavity variables have a covariance structure given by the overlaps of two spin configurations. We therefore call the model a perceptron version of the GREM . In contrast to the GREM itself, the model has a rich asymptotic behavior. The free energy is given by a formula which closely resembles the Parisi formula for the SK model. The limiting ultrametric structure depends in a complicated way on the the temperature parameter. Also, in contrast to the GREM , the model has the chaos property (in temperature). This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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